9999613 has 16 divisors (see below), whose sum is σ = 11226096. Its totient is φ = 8847360.

The previous prime is 9999601. The next prime is 9999637. The reversal of 9999613 is 3169999.

It can be written as a sum of positive squares in 8 ways, for example, as 127449 + 9872164 = 357^2 + 3142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999613 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38781 + ... + 39037.

It is an arithmetic number, because the mean of its divisors is an integer number (701631).

Almost surely, 2^9999613 is an apocalyptic number.

It is an amenable number.

9999613 is a deficient number, since it is larger than the sum of its proper divisors (1226483).

9999613 is a wasteful number, since it uses less digits than its factorization.

9999613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its digits is 118098, while the sum is 46.

The square root of 9999613 is about 3162.2164695036. The cubic root of 9999613 is about 215.4406897466.

The spelling of 9999613 in words is "nine million, nine hundred ninety-nine thousand, six hundred thirteen".